Hello, I just try to power up my old PC Engine GT console, and of course this beast doesn't work. So step by step: 1. I powered up console 2. Backlight up but no video from game 3. I heard very quiet ingame music (so game was started) I don't know maybe capacitor video / sound was broken? I have similar problem with my Sega Game Gear, and after change capacitors - console works great. I have no knowledge about PCE GT, so maybe here I can get any help... Thanks in advance.
Like its rival (Game Gear) and one of its brothers (PC Engine DUO/TurboDuo), the TurboExpress has a tendency for its caps to fail relatively quickly. I'd replace them ASAP cause if you don't, the board may be corroded. Here is a link to the capacitor values: http://console5.com/wiki/Turbo_Express
Its your caps brother. they are done for sure. I offer recaps with ceramic on express, GT, Laseractive